I am just trying to learn here, but I dont understand....for instance, 30-06 when running it into the die, it seems like the case is contacting the walls of the die less than halfway through the stroke, yet the part of the die that sizes the neck is all the way at the top. The best I can understand is that neck-sizing shouldn't be forming the chamber area but only the neck. What do I do? Just back it off 1/4 inch or so?